Which two numbers, from amongst the given options, should be interchanged to make the given equation correct?
$$\left(36 \div 4\right) \times12 + \left(7\times6\right) - 18 + \left(3\times9\right) = 63$$

A

6 and 4

B

3 and 4

C

4 and 12

D

12 and 3